Lamp-socket.



E. G. K. ANDERSON.

LAMP lsocxn'r. APPLICATION FILED MAY 12, 1909.

1,025,230. Patented May 71 1912 s SHEETS-SHEET 1 wif/556@ MMMJ/ E. G. K. ANDERSON.

LAMP SOCKET.

APPLICATION FILED nu 12, 1909.

Patented May 7, 1912.

3 BEEBTB-QHEHT 2.

E. G. K. ANDERSON.

LAMP SOCKET.

APPLICATION FILED nu 12, 1909.

Patented May 7, 1912.

3 SHEETS-SHEET 3.

' UNITED, 'STATES PATENT OFFICE..

'ERNST G. K. ANDERSON', OF CHICAGO, ILLINOIS, ASSIGNOR TO BENJAMIN ELEC- TBIG MANUFACTUBING COMPANY, OFjCHICAGO, ILLINOIS, A CORPORATION 0F n.rrivors.

LAMP-SOCKET.

Specification of Letters Patent.

Patented May 7, 1912.

Applicationfile' may 12, 1909. Serial No. 495,402.

To allw/'wm it may concern Be it known that I, ERNST G. K. ANDER: SON, a citizen ot the United States, residing at Chicago, in the county ot Cook and State'. of Illinois', have invented new and use ful Improvements in Lamp-Sockets, of which the following is a frh-clear. concise, and exact description, reference being had to the accompanying drawing, forming a part of this specification.

My invention relates to improvements in .the accompanying drawings, in Which- Figure 1 is a side elevation of my improved socket; Fig. a longitudinal sec. tion thereof; Fig. 3 is a transverse ,section taken on the line 3--3 of Fig. 2: 4 is a transverse section taken on the line 4.-4 ci Fig. 2; Fig. 5 is a longitudinal section taken on the line z55 of Fig. 6; Fig. 6 is a. transverse section taken on the line '(3--6 et Fig.

5; Fig. 7 is a bottom plan view ofthe socket; Fig. 8 is a detail View of one of the switch contacts; Fig. 9 is detail view showing the means for holding the lamp-receiving shell rigidly in position; Fig. 10 is a det-ail section of the plug portie-not the receptacle; Fig. 11 is a detail view of the insulatingr cover for the switch-receiving recess in the blu base Fi 12 is a detail View of a or- ,L 3

tion of the plug; Fig. 13 is a det-ail view of the switch; and'Fig. 14 is a disassociated view of the switch parts.

In the preferred embodiment of my invention, I provide an insulating base 14 t0 which the other parts of the lamp socket are secured. Extending from the top or" the base is an insulating projection or plug 15 which isfs'ecured ir. position by a bolt 16 adapted to extend clear through both sections of the base, the lower end or headl being adapted to secure in position' on the under side of the base the center Contact member 17 and the upper. end being adapted to sores" inte aleenvjection 31.

ter Contact plate 18 mounted on the top of the base section 15. This cont-act 18 provides a center contact which is adapted to,

make engagement with the center contact of the lamp receptacle into which the plug is adapted to be inserted. In addition to the center Contact 17, a lamp-receivin is also secured on the underside o? the base bya bolt 20 which is adapted to extend through a portion of the bottom ofthe lampreceiving shell through the insulatingbase and be screwed into a laterally extending shellv 19 lug 2.1 formed on the switch-'frame 22. At

a point diametrically opposite the bolt2 0, the bottom of the threaded shell -19 is pro' i-.ilcu with an upturned lip 23 which tits in a recess formed on the under side of the base '14 and prevents the t-hreaded shell from becoming twisted or displaced. The base 14 and threaded shellaresuitably inclosed in a metallic casing 24 having a suitable insulating lining Surrounding the plug projection 15 is a rotatable threaded metallic shell -26 which constitutes the outer Contact member of thel plug and is arranged to be screwed into the lamp socket to whichthe attachmentis to be connected. The lower end ofthe threaded shell is beaded over, as at 27, to receive an insulating collar 27, the outer periphery of which extends beyond the casing24, 'end provides means whereby the threaded shell 26 may be. rotated by the fingers. Arranged inv a suitable slot 28 extending transversely of. the plug section 15 isa relatively stationary switchcontact member. This member comprises a vertically extending portion 29 trom which extends a pair of springcontact jaws ,30 between Which`the` -movable member of the switch is adapted to engage.

and a transversely extending annular pro-v The' projection 31 extends around and closely hwjs thelower portion'v of the base projection 15 and isprovidedf- Surroundin projection isa metallic 'ring 33 Wh1h'n1ake5 engagement with the portionsl and' 32 and alsoA makes sliding engagement-'with the'l beaded portion". of the' .threadedshell 26;' wherebyA the Contactl aw's '30* are 'connected-- with a downwardly extending portioxif32.

the lower portion of the base 1 tending 'the plate 37 in position.

contact is located in the recess 28 is an insulating sleeve 34 which serves to hold the contact member in position.

The lower portion of the base projection 15 and the upper portion of the base 14 are recessed as at 35, and arranged in this recess are the operating parts of the movable switch member 36 which is adapted to op' erate in the recess 28 and make and break contact with the contact jaws 30. The operating parts of the movable switch member are all mounted on the switch frame 22 which comprises a plate 37, the upper end of which has an inturned lug 38'into whichA screws the bolt 39 adapted to pass through the upper section 15 and aid in maintaining the movable contact 36 lof the switch and on f the 4other sideof the plate is pivoted an oscillating member 43 for operating the switch member 36. The oscillating member 43 is rovided with a projection 45 which extendns `on thejunderside of the plate 37 vand lies parallel to an angular projection 46 on the movable switch' member 36. Snrrounding-the stud 42 is a coiled spring 47, the ends of which are spaced apart by the projections 45 and 46, whereby the two projections are connected together by the coiled ipring, and when the oscillating member 43 iovesin one direction, through the connection of the coil spring, th'e'movable switch Hmember will also be oscillated in the same direction. On the rear side of the oscillating switch member is a spring/18, the end 49 of which is bent at an angleand project-s througlra slot in the oscillating switch member 36 and also'through a.slot y50 in the plate 37. V'Centrally located in this slot is a projection` 51 against which the `enti 49 of the spring engages. The oscillatinginember 43 is provided with a cam face 52'Which is adapted also to engage the projection 49 and littth'e same under proper conditions out of engagement with the projection 51. A pair of-shoulders 53andj 54 are provided on the oscillating member,` which are engaged by the means operated by the pull member ofthe switch foi" the yoscillating member.- This operating means comprises a rotating shaft 55 havingtransversely exprojections vor pins 56 and 57 -eX- tending therethrough, these pins being disposed relatively to one another, so that when one pin isnengagemcnt withone of the shoulders for 54, the otherpin has made Side ears. 40 and 41- a half turn. The outer end of the shaft has rotatably mounted thereon a pull lever 58, made of insulating material, to which is connected the pull chain 59 for the switch, which chain is adapted to extend through the casing whereby it may be operated from the exterior. The lever has a transversely extending projection 60, (Fig. adapted to make engagement with the teeth of a ratchet 61 rigidly connected on t-he shaft 55 and the lever is adapted to be moved back to. normal position after the chain has been released by av coiled spring 62, one end of which is adapted to bear againstthe under side of an insulating cover plate 63, the other end of which is'adapted to engage a second projection 60a. The cover plate 63 is adapted to close the recess 35 in the base v14 and provided with an openinglnerely largel enough to accommodate those parts which"` project beyond the surface of the plate. 'g Secured to the under side of this cover 'plate is a spring finger 65 which engages 'the ratchet teeth 61 to prevent the ratchet from operating in a reverse direction. l

In operation, the rotating sleeve is screwed into an ordinary lamp socket, the center con- .tactlS being adapted to make engagement with the center contactI of the lamp socket, and the; rotating threaded shell 26 being adapted to make engagement with the threaded shell of the socket. Due to the connection between the center Contact .l and center contact 17, .the center contact 17 electrically connected with thecenter contact of the lamp socket, and it will'bc noted that the threaded shell 19 is electrically' connected with the switch member 36 by means of the bolt 21 and the frame 22, and as the rotatingvthreaded shelli`36 is,`as hereinbefore described, electrically connected with the switch jaws 30, when the oscillating switch member is` in engagement with the jaws, the threadedV shell A19 is electrically connected with the rotating sleeve 26, which in turn. is connected with the outer contact of tehI lamp socket. When it` is desired toclose thi:

vswitch'22, lassuming that the same is in the open position, the pull chain 59 is pulled upon. This operates the lever 58 which in turn, Ithroughv the ratchet wheel 61, rotateF the-shaft 55. The rotation of 'theshaft 51: causes, say,the pin 57, to engage the shoulder .3 on the oscillating member' and throw the lower' end of the same to the left., referring particularly to Figs13 and 14. This places the spring 47 undertension, but the oscillating switch member 37 will not move due to thevengagenient of .the end 49'; with the projection 51. As the oscillating member is moved, however,' the cam surface 52 engages ment. with. the shoulder, and the oscillatiiig SWltCh member will be permitted to. snap 'the end 49, raising the end out of engagc-y over under the influence of thespring 47 and move into engagement With the cont-act 30, thereby closing the lamp circuit. When the pull chain is released by the operator, the coiled spring 62 throws the lever 5S back into a position to again rotate the shaft F5' which will cause the opposite pin 56 to engage the shoulder 54 and thereby oscillate the oscillating member and'with it, as above described, the switch member' 36.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is j l. The combination With a lamp-receivin device, of a plug associated therewith anA having a center contact and side contacts, an 4oscillating switch for connecting one of' the contacts o said plug with one of the con tacts of the lamp-receiving device, and a flexible pull member for operating said switch.

2. The combination with a lamp-receving device, of a plug associated therewith Ahaving a center cont-act, a rotatable outer Contact carried by said plug, a switch contact having a portion arranged to be slidably en gagcd by said outer contact, and a switch arm for connecting said switch contact with one of the contacts of the lamp-receiving device.

ln a device of the character described, the combination with an insulating base, of a threaded shell and center contact mounted on one side ot' said base, an insulating projection on the other side of said base, a center contact mounted on said projection and a rotatable threaded contact. mounted on said projection, a stationary switchlcontact arranged in a recess in saidprojectionA andv having a. slidirg el, trical connection with said rotatable sleeve, an' oscillating switch Contact mounted in a recess i'n said insulating base, and a tiexble pull member extending to the exterior of the socket casing for operating said oscillating switch Contact'.

' 4. in a device of the character described,

the combination with an insulating base, of

a center contact and threaded lamp-receivv ing shell mounted on one side thereof, an insulating projection from said base on `the other side thereof, a center Contact mounted on the end of said projection, a rotatable threaded sleeve surrounding said projection, a stationary switch contact mounted in a recess in said projection and having av slid.- ing electrical connection with said rotatable sleeve, an oscillating switch Contact operating in said recess and mounted on a frame arranged in a recess in saidV oase and having electrica-l connection with said threaded shell, an ,oscillating member, a spring c0nneeting said oscillating member with the oscillating switch contact, a iexible' pull member extending to the exterior of the socket casing for operating said oscillating member, and meansfor holding the oseillating switch member against movement until the spring has been placed under sutil-' cient tension to operate the same..

5. In a device of the character described,

the combination with an insulating base, of

projection, an oscillatingsi'witch Contact, 'an Y ANDERSON'. 

